Twenty four wetlands in the Beijing area have been investigated by means of transect lines and square sample plots. Species richness and dominance indices of typical wetland plants and five biodiversity indices of wetland vascular plants have been calculated. Based on these results, the wetlands were classified by cluster analysis and graded. The district protection area consists of three wetlands: the Miyun Reservoir, Jinniuhu Lake and Guihe River; the first and second grade protection area both consist also of six wetlands: the first area includes Jumahe River, Hanshiqiao and Yeyahu Lake; the second Huairou Reservoir, Yongdinghe River and Jinhaihu Lakes. The third protection area consists of four wetlands: Beishahe and Chaobaihe Rivers, Longqingxia Reservoir and Guishuihu Park. The restoration area consists of five wetlands and includes the Baihebao Reservoir, Beiyunhe and Liangshuihe Rivers. Considering the characteristics of wetlands, we propose the establishment of national, municipal and county nature reserves, wetland protection and restoration plots and finally municipal and county wetland parks.